Sparc 20 keeps rebooting with fatal system fault: sipr=40000000

From: Amit Arora (aroraamit21@yahoo.com)
Date: Tue Dec 09 2003 - 22:51:08 EST

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I have two Sparc 20 stations running Solaris 2.6.
Recently both the systems started rebooting by
themselves. The messages captured from one of the
station are as follows -

SunOS Release 5.6 Version Generic_105181-35 [UNIX(R)
System V Release 4.0]
Copyright (c) 1983-1997, Sun Microsystems, Inc.
pac: enabled - SuperSPARC/SuperCache
cpu0: TI,TMS390Z55 (mid 8 impl 0x0 ver 0xc clock 75
MHz)
cpu1: TI,TMS390Z55 (mid 10 impl 0x0 ver 0xc clock 75
MHz)
mem = 327680K (0x14000000)
avail mem = 323207168
Ethernet address = 8:0:20:7a:13:ee
root nexus = SUNW,SPARCstation-20
iommu0 at root: obio 0xe0000000
sbus0 at iommu0: obio 0xe0001000
espdma0 at sbus0: SBus slot f 0x400000
esp0: esp-options=0x46
esp0 at espdma0: SBus slot f 0x800000 sparc ipl 4
esp0 is
/iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000
sd1 at esp0: target 1 lun 0
sd1 is
/iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@1,0
        <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
sd3 at esp0: target 3 lun 0
sd3 is
/iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@3,0
        <SUN2.1G cyl 2733 alt 2 hd 19 sec 80>
sd6 at esp0: target 6 lun 0
sd6 is
/iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@6,0
root on
/iommu@f,e0000000/sbus@f,e0001000/espdma@f,400000/esp@f,800000/sd@3,0:a
fstype ufs
No contiguous memory requested for SX
obio0 at root
zs0 at obio0: obio 0x100000 sparc ipl 12
zs0 is /obio/zs@0,100000
zs1 at obio0: obio 0x0 sparc ipl 12
zs1 is /obio/zs@0,0
cgfourteen0 at obio0: obio 0x0 and obio 0x0 sparc ipl
8
cgfourteen0 is /obio/cgfourteen@2,0
cpu 0 initialization complete - online
cpu 2 initialization complete - online
ledma0 at sbus0: SBus slot f 0x400010
le0 at ledma0: SBus slot f 0xc00000 sparc ipl 6
le0 is
/iommu@f,e0000000/sbus@f,e0001000/ledma@f,400010/le@f,c00000
dump on /dev/dsk/c0t3d0s1 size 524372K
fatal system fault: sipr=40000000
Async Fault from module 0: afsr b302000 afar=8b78580
aerr0 0 aerr1=0
MMU sfsr=b302000: No Error on user data fetch at level
0
        M-Bus Undefined Error
MXCC Error Register:
panic: Fatal Asynchronous Fault

syncing file systems...WARNING: tmp_putapage: err 5

WARNING: tmp_putapage: err 5

573WARNING: tmp_putapage: err 5

WARNING: tmp_putapage: err 5